I think any manager deserves at least 6 months before you can properly judge however from what I've seen so far I don't get the people who are willing to give him 18-24 months before asking questions when our defending has been shocking and we are basically no better than last season in alot of respects.
Im willing to give him until Christmas but if we are in the bottom half with the same poor results I wouldnt be bothered if Moshiri booted him out the club.
I've said it from day one that unless you have city or chelsea cash the only way to progress is with a top quality manager (see Klopp, Pochettino) Silva for me isn't in that bracket at present. Wolves manager for example looks alot more impressive and flexible with lesser players bar Neves and Moutinho and has taken points off both Manchester clubs already.
If this appointmemt goes south we need to stop highing flavour of the month average managers and offer crazy wages for a top coach - Jardim, Ancelotti, Blanc, Conte someone who will come in and revolutionise the club.
Look at Leeds with Biesla in the Championship a manager cut above the rest in a division is worth their weight in gold - make them one of the highest paid managers in the world just get one in.